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Squashed 'third_party/git/' content from commit cb71568594

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git-subtree-dir: third_party/git
git-subtree-split: cb715685942260375e1eb8153b0768a376e4ece7
This commit is contained in:
Vincent Ambo 2020-01-11 23:36:56 +00:00
commit 1b593e1ea4
3629 changed files with 1139935 additions and 0 deletions
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65
perl/Git/SVN/GlobSpec.pm Normal file
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package Git::SVN::GlobSpec;
use strict;
use warnings;
sub new {
my ($class, $glob, $pattern_ok) = @_;
my $re = $glob;
$re =~ s!/+$!!g; # no need for trailing slashes
my (@left, @right, @patterns);
my $state = "left";
my $die_msg = "Only one set of wildcards " .
"(e.g. '*' or '*/*/*') is supported: $glob\n";
for my $part (split(m|/|, $glob)) {
if ($pattern_ok && $part =~ /[{}]/ &&
$part !~ /^\{[^{}]+\}/) {
die "Invalid pattern in '$glob': $part\n";
}
my $nstars = $part =~ tr/*//;
if ($nstars > 1) {
die "Only one '*' is allowed in a pattern: '$part'\n";
}
if ($part =~ /(.*)\*(.*)/) {
die $die_msg if $state eq "right";
my ($l, $r) = ($1, $2);
$state = "pattern";
my $pat = quotemeta($l) . '[^/]*' . quotemeta($r);
push(@patterns, $pat);
} elsif ($pattern_ok && $part =~ /^\{(.*)\}$/) {
die $die_msg if $state eq "right";
$state = "pattern";
my $p = quotemeta($1);
$p =~ s/\\,/|/g;
push(@patterns, "(?:$p)");
} else {
if ($state eq "left") {
push(@left, $part);
} else {
push(@right, $part);
$state = "right";
}
}
}
my $depth = @patterns;
if ($depth == 0) {
die "One '*' is needed in glob: '$glob'\n";
}
my $left = join('/', @left);
my $right = join('/', @right);
$re = join('/', @patterns);
$re = join('\/',
grep(length, quotemeta($left),
"($re)(?=/|\$)",
quotemeta($right)));
my $left_re = qr/^\/\Q$left\E(\/|$)/;
bless { left => $left, right => $right, left_regex => $left_re,
regex => qr/$re/, glob => $glob, depth => $depth }, $class;
}
sub full_path {
my ($self, $path) = @_;
return (length $self->{left} ? "$self->{left}/" : '') .
$path . (length $self->{right} ? "/$self->{right}" : '');
}
1;